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인용균

In, Yongkyoon
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Reduced critical rotation for resistive-wall mode stabilization in a near-axisymmetric configuration

Author(s)
Reimerdes, H.Garofalo, A. M.Jackson, G. L.Okabayashi, M.Strait, E. J.Chu, M. S.In, Y.La Haye, R. J.Lanctot, M. J.Liu, Y. Q.Navratil, G. A.Solomon, W. M.Takahashi, H.Groebner, R. J.
Issued Date
2007-02
DOI
10.1103/PhysRevLett.98.055001
URI
https://scholarworks.unist.ac.kr/handle/201301/23784
Fulltext
https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.98.055001
Citation
PHYSICAL REVIEW LETTERS, v.98, no.5, pp.055001
Abstract
Recent DIII-D experiments with reduced neutral beam torque and minimum nonaxisymmetric perturbations of the magnetic field show a significant reduction of the toroidal plasma rotation required for the stabilization of the resistive-wall mode (RWM) below the threshold values observed in experiments that apply nonaxisymmetric magnetic fields to slow the plasma rotation. A toroidal rotation frequency of less than 10 krad/s at the q = 2 surface (measured with charge exchange recombination spectroscopy using C VI) corresponding to 0.3% of the inverse of the toroidal Alfven time is sufficient to sustain the plasma pressure above the ideal MHD no-wall stability limit. The low-rotation threshold is found to be consistent with predictions by a kinetic model of RWM damping.
Publisher
AMERICAN PHYSICAL SOC
ISSN
0031-9007
Keyword
DIII-DPLASMA ROTATIONERROR-FIELDTOKAMAK

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